Abelian periods, partial words, and an extension of a theorem of Fine and WilfFrancine Blanchet-Sadri, Sean Simmons, Amelia Tebbe and Amy VeprauskasRAIRO-Theor. Inf. Appl., 47 3 (2013) 215-234DOI: https://doi.org/10.1051/ita/2013034